Of course everyone reading this knows about the #NASASocial event for the launch of the LADEE mission to Lunar orbit happening this week on Thursday (9/5) and Friday (9/6). Follow NASASocial/lists/ladee-launch-social plus @NASA_Wallops, @NASALADEE, @NASAAmes, @NASAGoddard, and also @LRO_NASA for updates.

A nice piece of Wallops history was raised by @TeresaR_WV: “Explorer 9 was the first spacecraft placed in orbit by an all-solid rocket and the first spacecraft successfully launched into orbit from Wallops Island.” (1961, NSSDC).

The LADEE social will be covering a huge range of subjects, including the following.

The LADEE mission will be collecting data on the Lunar Exosphere, specifically tightening the boundaries on gas and dust types and quantities found at altitudes under 50 km so that future work can develop an understanding of the surface boundary exospheric processes that occur on inert rocky bodies like the Moon and Mercury. And the LADEE mission will be flight qualifying the LLCD free space optical communications link. Data collection in the Lunar Exosphere will employ three instruments.

The Neutral Mass Spectrometer (NMS) determines captured (Lunar Exosphere) gas particle types (element) using a kind of electromagnetic filter called an RF Quadrupole or Quadrupole mass analyzer, or Mass Spectrometer. Instruments very similar to this one have flown on many deep space missions including CASSINI. In determining gas types with fairly high frequency (many per second), gas quantity and distribution can be determined over time.

The Ultraviolet – Visible Spectrometer (UVS) will determine observed (Lunar Exosphere) gas types by the characteristic electromagnetic emission spectra of gas particles impacted by solar radiation. It is also capable of a few additional modes (that I haven’t groked yet) that provide information about gas and dust processes in the exosphere.

The Lunar Dust Experiment (LDEX) captures larger “dust” particles to determine composition and distribution over time, not entirely unlike the NMS. Also not entirely unlike the NMS, it employs an electromagnetic process to do so.

The NMS and LDEX are forward facing, while the UVS is rearward facing, in LADEE’s direction of flight. That is, LADEE flies sideways relative to its Lunar Capture rocket engine which it points out of the way otherwise.

The SpaceTweetup took place on German Aerospace Day at the joint DLR and European Astronaut Centre site in Cologne. It was an amazing day, which not even the German grey and rainy weather could spoil! …it did, of course, make our photographs a bit murky, but that’s about it!

The SpaceTweetup program was full and exciting. So many thrills packed inside approx. 10 hours that could have easily been the object of two or more separate events. For those who didn’t get to attend, a four hour (!) long selection of the best moments is available on ESA’s site.

SOFIA

Photo credit: @SimSullen

The day started very excitingly. We visited and learned about the SOFIΑ Project (Stratospheric Observatory for Infrared Astronomy), DLR and NASA’s impressive airborne telescope. Mounted on a Boeing 747SP aircraft modified by L-3 Communications Integrated Systems, SOFIA has a 2.5 meter reflecting telescope, which makes measurements during flight! High above the disturbances caused by Earth’s atmosphere, but also easily accessible for maintenance and modifications, SOFIA combines the advantages of space telescopes, like Herschel and Hubble, with the ease of ground based telescopes.

The science done on SOFIA is planned by the Universities Space Research Association (USRA) and the Deutsches SOFIA Institut (DSI) under the leadership of NASA Ames Research Centre. Observing mostly in the far infrared, SOFIA will be used to study many different kinds of astronomical objects and phenomena, such as e.g. star birth and death, formation of new solar systems, identification of complex molecules in space (such as organic materials necessary for life), planets, comets and asteroids in our own solar system, nebulae and dust in galaxies and black holes at the centre of galaxies, helping to answer many fundamental questions about the creation and evolution of the Universe.